ᐅ Window sills: with or without drip groove?

hampshire schrieb:

Those are true wonder grooves that hold back water moved by the wind!

Well, something like that! Let the original poster take a look at samples. The groove wouldn’t exist if it didn’t serve a legitimate purpose. And we’re definitely not talking about aluminum window sills!

tumaa schrieb:

Then I’ll just make compromises on the appearance.

I don’t see it as a compromise; the grooves don’t have bright red edges anyway.

hampshire schrieb:

Those are real miracle grooves that stop water moved by the wind!

Nonsense, no miracles. The windowsill is sloped lengthwise, but level across >>> Result: precipitation drains evenly across the width. However, the ideal conditions of still wind and perfectly vertical rainfall rarely occur. The deflected wind-driven rain is pushed sideways on the windowsill depending on wind direction—so on one side toward the reveal—and would cause higher wetting there. Along this path, a groove allows some of the water to drain away. And it’s actually quite a significant amount, since the groove is several water-layer heights deep. No magic—just a simple drip edge or whatever it’s called.

Vicky Pedia schrieb:

And we’re definitely not talking about aluminum windowsills!

With those, an upstand additionally provides stability for the overhang.

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